原子核对心率控制的分子分歧 模两可的
Maira Jalil1, Tatiana C Coverdell2, Veronica A Gutierrez1
1Department of Biology, University of Virginia, Charlottesville, VA.
bioRxiv : the preprint server for biology
|January 3, 2024
概括
研究人员在模糊核 (nAmb) 中确定了控制心率的不同神经元亚型. 具体来说,表达Npy2r的nAmb神经元对于在跳水等自主反射过程中调节心脏功能至关重要.
科学领域:
- 神经科学是一个神经科学.
- 心脏病学 心脏病学
- 分子生物学分子生物学
背景情况:
- 模糊核 (nAmb) 调节心肺功能和上呼吸道控制.
- 一个nAmb神经元子集通过迷走神经刺激心脏,影响心脏功能和自主反射.
- 心血管nAmb神经元的分子和解剖学区别在很大程度上仍然没有特征.
研究的目的:
- 根据分子形状,心脏内置和心率 (HR) 控制,对成年老鼠nAmb神经元进行分类.
- 为了确定负责心血管功能的特定nAmb神经元亚型.
主要方法:
- 单核RNA测序用于分析nAmb神经元的全基因组表达特征.
- 轴突投影映射测绘以确定nAmb神经元亚型的内化目标.
- 光遗传刺激以评估nAmb神经元在HR控制中的功能作用.
- 行为实验涉及小鼠自愿潜水的行为实验.
主要成果:
- 全基因组表达分析预测了nAmb神经元的多个分子亚型.
- 鉴定出表达Npy2r的nAmb神经元可以内化心脏.
- 对Npy2r+ nAmb神经元的光遗传刺激显著减缓了HR,相当于刺激所有nAmb阴效应.
- 在小鼠的潜水反应中,Npy2r+nAmb神经元被激活.
结论:
- 这项研究阐明了核模两可的神经元的分子组织.
- 确定Npy2r表达的nAmb神经元作为具有关键心血管功能的独特亚型.
- 证明了Npy2r+ nAmb神经元在自主反射期间控制心率中的作用.
相关概念视频
01:31Regulation of Heart Rates
1.8K
The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
1.8K
01:21Brainstem: Control Centers of Medulla
1.6K
The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
1.6K
01:19Conduction System of the Heart
7.1K
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
7.1K
01:30Factors Influencing Heart Rate
2.7K
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
2.7K
01:27Regulation of the Cardiovascular System
1.1K
The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
1.1K
01:28Disturbances in Heart Rhythm
963
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
963